3. noise pollution
4. reuse
5. greenhouse effect
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1.noise pollution - Noise pollution, also known as environmental noise or sound pollution, is the propagation of noise with ranging impacts on the activity of human or animal life, most of them harmful to a degree. The source of outdoor noise worldwide is mainly caused by machines, transport, and propagation systems.
2.reuse - Reusing is the act of taking old items that you might consider throwing away and finding a new use for them.
3.green house effect - the trapping of the sun's warmth in a planet's lower atmosphere, due to the greater transparency of the atmosphere to visible radiation from the sun than to infrared radiation emitted from the planet's surface.
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